• BMB Reports
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• v.35 no.5
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• pp.494-497
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• 2002

The present study explored the short-term effects of dietary conjugated-linoleic acid (CLA) on liver lipid metabolism in starved/refed Otsuka Long Evans Tokushima Fatty (OLETF) rats. Male OLETF rats (12 weeks old) were starved for 24 hours, then refed for 48 hours with either a CLA diet [7.5% CLA and 7.5% Safflower oil (SAF)] or a SAF control diet (15% SAF). The results demonstrated a 30% reduction of hepatic triglyceride (TG) concentration in the CLA group when compared to the control group. Liver cholesterol concentration was also 26% lower in the CLA fed rats. The activity of mitochondrial carnitine palmitoyltransferase, the rate-limiting enzyme of fatty acid oxidation, was moderately elevated by 1.2-fold in the livers of the CLA group when compared to the control. In contrast, phosphatidate phosphohydrolase, the rate-limiting enzyme for TG synthesis, was found to be 20% lower in the livers of the CLA-fed rats. Therefore, dietary CLA evidently lowers liver lipid concentrations through a reduced TG synthesis and enhanced fatty acid oxidation in starved/refed OLETF rats.

• Toxicological Research
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• v.25 no.2
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• pp.85-92
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• 2009

4,4'-Methylenedianiline (MDA) is an aromatic amine that is widely used in the industrial synthetic process. Genotoxic MDA forms DNA adducts in the liver and is known to induce liver damage in human and rats. To elucidate the molecular mechanisms associated with MDA-induced hepatotoxicity, we have identified genes differentially expressed by microarray approach. BALB/c male mice were treated once daily with MDA (20 mg/kg) up to 7 days via intraperitoneal injection (i.p.) and hepatic damages were revealed by histopathological observation and elevation of serum marker enzymes such as AST, ALT, ALP, cholesterol, DBIL, and TBIL. Microarray analysis showed that 952 genes were differentially expressed in the liver of MDA-treated mice and their biological functions and canonical pathways were further analyzed using Ingenuity Pathways Analysis (IPA). Toxicological functional analysis showed that genes related to hepatotoxicity such hyperplasia/hyperproliferation (Timp1), necrosis/cell death (Cd14, Mt1f, Timp1, and Pmaip1), hemorrhaging (Mt1f), cholestasis (Akr1c3, Hpx, and Slc10a2), and inflammation (Cd14 and Hpx) were differentially expressed in MDA-treated group. This gene expression profiling should be useful for elucidating the genetic events associated with aromatic amine-induced hepatotoxicity and for discovering the potential biomarkers for hepatotoxicity.

• Nutritional Sciences
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• v.6 no.2
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• pp.100-105
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• 2003

Small dense LDL(LDL III) is emerging as a major risk factor for coronary artery disease. LDL III generation is associated with high triglyceride concentration, high hepatic lipase activity, and high cholesterol ester transfer protein (CETP) levels. CETP polymorphisms have been reported to be associated with coronary artery disease. In this study, we investigated the relationship between CETP polymorphism and LDL III generation. VLDL1, VLDL2, IDL and LDL subfractions were measured in 87 normal healthy Korean subjects who had been SNP genotyped for Taq1B, I405v and A629C. We found no differences in LDL subfractions and lipoprotein composition between homozygotes for Taq1B2B2, and those for Taq1B1B1 and Taq1B1B2. There were no differences in LDL subfractions and lipoprotein composition between homozygotes for 629AA, and those for 629AC and -629CC. However, homozygotes for 405VV had a significantly lower LDL III concentration and proportion than those for 405II and 405IV. We concluded that, among the Taq1B, I405V and A629C polymorphisms, only the 1405V polymorphism was associated with the concentration and proportion of LDL III.

• Nutrition Research and Practice
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• v.3 no.3
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• pp.208-211
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• 2009

This study investigated the effect of vitamin $B_6$ deficiency on antioxidant enzyme activities and lipid profile in rats with exercise-induced oxidative stress. Forty eight rats were fed either a vitamin $B_6$ deficient diet (B6-) or a control diet (control) for 4 weeks and then subdivided into 3 groups: pre-exercise (PreE); post-exercise (PostE); recess after exercise (recessE). Compared to those of control group, plasma catalase and hepatic cytosol superoxide dismutase (SOD, EC 1.15.1.1) activities of B6- group were lower regardless of exercise. The ratio of reduced glutathione/oxidized glutathione (GSH/GSSG) of B6 - group was lower in PreE and there was no difference between PostE and recessE. The level of malondialdehyde (MDA) of B6- was significantly higher in PreE and PostE. High-density lipoprotein-cholesterol (HDL-C) level of B6- group was lower regardless of exercise. Atherosclerotic index of $B_6$- group was higher in PreE and there was no difference between PostE and recessE. It is suggested that a reduction in antioxidative status caused by vitamin $B_6$ deficiency may be aggravated under exercise-induced oxidative stress.

• Preventive Nutrition and Food Science
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• v.19 no.2
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• pp.69-74
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• 2014

The present study investigated the anti-obesity effects of Mycoleptodonoides aitchisonii (MA) in mice fed a high-fat (HF) diet. Two groups were fed either a normal control diet or an HF (45% kcal fat) diet for 12 weeks and three groups were fed an HF diet supplemented with powdered MA (MAP, 1%, 3%, and 5%) for 12 weeks. The anti-obesity effects of MAP supplementation on body weight, fat mass development, and lipid-related markers were assessed. Consumption of an HF diet resulted in increased body weight, serum lipids, relative adipose tissues weight, and liver fat accumulation. However, administration of MAP significantly decreased body weight gain, food intake, food efficiency ratio, hepatic cholesterol level, and adipose tissue weight in a dose-dependent manner. In addition, treatment with MAP significantly reduced the occurrence of fatty liver deposits and steatosis, and inhibited an HF diet-induced increase in adipocyte size. These results suggest that dietary supplementation with MAP exerts anti-obesity effects and indicate that MAP could be used as a functional food to control obesity.

• Journal of Preventive Medicine and Public Health
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• v.31 no.2 s.61
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• pp.167-182
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• 1998

The purpose of this study was to identify the major health components and measurements to be conducted in National Health Examination Survey(KNHES). The prevalence and severity of disease, acceptability of population and the possibility of standardization of measurement were considered as guideline for selecting the components. On the base of magnitude and severity of disease, chronic liver disease, hepatic cancer, gastric ulcer, stomach cancer, essential hypertension, cerebrovascular disease, ischemic heart disease, pulmonary tuberculosis, lung cancer, DM, breast cancer, cervical cancer, arthritis and intervertebral disc disorder were selected as the preliminary target diseases. Questionnaire survey for 648 persons in 'K' city and medical specialists in five clinical societies were conducted for evaluation the acceptability of general population for the measurements and the possibility of standardization for the procedures. In conclusion, the major target diseases were chronic liver disease, hypertension and DM and the total cholesterol, high density lipoprotein, triglyceride, total protein, albumin, hemoglobulin, hematocrit, platlet count, anti-HBs, HBsAg, height and weight were selected for basic physical components.

• Advances in Traditional Medicine
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• v.7 no.4
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• pp.372-378
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• 2007

A well known Ayurvedic formulation Ashokarista, used for menstrual disorders has been studied in a single blind randomised placebo controlled clinical trial for the treatment of menorrhagia and dysmenorrhoea. Dysmenorrhoea and menorrhagia patients who were taking Ashokarista (20 ml twice daily) for 10 menstrual cycles had an increase in haemoglobin level. Menorrhagia treated group has shown to reduce the erythrocyte sedimentation rate level that has been increased in the menorrhagia control group. The platelet count, total count and differential count were observed unchanged in the study. The Ashokarista did not affect the SGPT and SGOT level, which signify its lack of toxicity in hepatic function. The treated menorrhagic patients showed an increase in serum albumin content and decrease in blood clotting time, whereas the serum protein content was observed unchanged. There was a significant increase in both serum cholesterol and triglyceride level, which usually associated with the use of oral contraceptives. No major side effects were observed by the clinicians during the study.

• Journal of the Korean Society of Food Science and Nutrition
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• v.19 no.1
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• pp.27-34
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• 1990

This study was undertatken to investigate the effects of dietary vitamin E on the toxicity of cadmium(Cd) in rats. The two variables were the supplmentary vitamin E(400lU/kg) and the protein amount(10.5% in the low protein diet and 18.0% in the normal protein diet) In cadmium treated rats net weight gain and food intake were decreased but improved by supplementation with vitamin E in the normal protein, hematocrit values reduced by Cd were significantly increased by the addition of vitamin E to normal protein diet in Cd intoxicated rats, The supplementation with vitamin E diminished the effect of Cd on aspartate aminotransf-rase and alanine aminotransferase activities in serum In Cd treated rats fed normal protein diet with vitamin E the contents of triglyceride were decreased and total-cholesterol contents were significantly reduced in serum and both of them in liver were markedly decreased. The activity of alcohol dehydrogenase in liver was decreased by Cd however supplementation with vitamin E reduced the effects of Cd on hepatic alcohol dehydrogenase. the results of this experiment indicated that there was some interaction between vitamin E and protein levels and supplementation with vitamin E had an effect more than protein levels oncd toxicity.

• The Journal of Korean Medicine
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• v.24 no.3
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• pp.45-50
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• 2003

Background and Purpose : Chunghyul-dan has been widely used in the Department of Cardiovascular ＆ Neurologic Diseases, Kyung Hee Oriental Medical Center to prevent stroke by lowering serum cholesterol level. Previous experimental and clinical studies revealed that Chunghyul-dan had therapeutic effects on hyperlipidemia by inhibiting HMG-CoA reductase and pancreatic lipase. It was also reported that Chunghyul-dan showed an anti-oxidation effect by scavenging free radicals and inhibiting nitric oxide synthesis. Therefore, we examined the safety of Chunghyul-dan on all subjects who had been treated with it. Methods : We performed a retrospective study by reviewing the medical records of those who had been administrated Chunghyul-dan at Kyung Hee Oriental Medical Center from February 8,2001 to December 31,2002. The subjects' general characteristics (gender, age, medical history, and present illness), recorded adverse effects, and the results of laboratory findings were obtained and analyzed to assess the clinical safety of Chunghyul-dan. Results : Six hundred fifty six subjects were treated with Chunghyul-dan. Clinical adverse effects appeared in 13 subjects, the major symptom being indigestion (8 subjects). The apparent frequency of adverse effects was much lower than that in previous reports on the safety of certain medications. On investigation of laboratory findings, we could not find any hepatic or renal toxicity. Conclusion : We suggest that our results contribute towards confirming the safety of Chunghyul-dan by offering clinical evidence.

• Genomics & Informatics
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• v.7 no.2
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• pp.97-106
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• 2009

Epigallocatechin gallate (EGCG), a well-known antioxidant molecule, has been reported to cause hepatotoxicity when used in excess. However, the mechanism underlying EGCG-induced hepatotoxicity is still unclear. To better understand the mode of action of EGCG-induced hepatotoxicity, we examined the effect of EGCG on human hepatic gene expression in HepG2 cells using microarrays. Analyses of microarray data revealed more than 1300 differentially expressed genes with a variety of biological processes. Upregulated genes showed a primary involvement with protein-related biological processes, such as protein synthesis, protein modification, and protein trafficking, while downregulated genes demonstrated a strong association with lipid transport. Genes involved in cellular stress responses were highly upregulated by EGCG treatment, in particular genes involved in endoplasmic reticulum (ER) stress, such as GADD153, GADD34, and ATF3. In addition, changes in genes responsible for cholesterol synthesis and lipid transport were also observed, which explains the high accumulation of EGCG-induced lipids. We also identified other regulatory genes that might aid in clarifying the molecular mechanism underlying EGCG-induced hepatotoxicity.